Research-context information only. Semax is a research peptide approved in Russia as a finished pharmaceutical product but not FDA-approved in the United States. Protocols, doses, and reactions reported below come from published research (mostly Russian) and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.
The buying problem is unique to semax: most users administer it intranasally, so pre-mixed nasal sprays are the dominant format. There are also two structurally distinct variants — semax (free peptide) and N-acetyl semax (acetylated for longer half-life) — that vendors sometimes confuse in product listings.
This guide covers documented per-mg pricing, format selection, COA verification, and red flags. For dosing context, see the semax dosing guide.
This is not a ranked vendor list — for that, see our Best Semax Vendors comparison.
Understanding Semax Pricing
Semax ships in three formats:
Lyophilized vials (5-30mg) — User reconstitutes into nasal spray bottle.
Pre-mixed nasal sprays (30mg/3mL) — Most-cited format for convenience.
N-acetyl semax variants — Slight premium for longer half-life.
Current Market Pricing (2026)
Format & Size
Best For
5mg lyophilized vial
Tolerance testing
30mg pre-mixed nasal spray (1%)
Standard intranasal use — best all-around
30mg N-acetyl semax nasal spray
Long half-life users
30mg × 3 (kit)
Long protocols
The pattern: Per-mg pricing overlaps across formats; the largest units (30mg and up, in either vial or spray form) tend to carry the lowest per-mg price. Both formats use the same underlying peptide. For a lyophilized reference point, Ascension Peptides' 10mg vial is $25.00 (50% off sitewide through our link).
Cost Per Month at Common Doses
Daily Dose
Monthly Mass
5mg vials per month
One 30mg nasal spray lasts
1 mg, 2-3 days/week (community protocol, SubQ)
~9-13 mg
~1.7-2.6
~2.3-3.5 months
200 mcg/day
6 mg
~1.2
~5 months
400 mcg/day (mid-range)
12 mg
~2.4
~2.5 months
600 mcg/day
18 mg
~3.6
~1.7 months
Key insight: at the same daily dose, cost per dose follows the vendor's per-mg price, and that overlaps between sprays and vials. Unit size matters more than format: larger units tend to be cheaper per mg.
For current vendor-specific pricing, see our Best Semax Vendors comparison.
Compare recommended vendors: live vial and nasal-spray prices from every recommended vendor, with $/mg and stock, are on the Best Semax Vendors page. Compare current vendors ↓
For Ion Peptide's COA approach and format lineup, see our Ion Peptide review.
How to Verify Semax Quality
Semax is a 7-residue peptide (Met-Glu-His-Phe-Pro-Gly-Pro) — straightforward synthesis without unusual amino acids. The verification challenge is variant clarity (semax vs N-acetyl semax) and ensuring nasal sprays haven't degraded during storage.
What a COA Should Include
Identity Confirmation
Mass spectrometry confirming 813.92 Da for semax or 855.96 Da for N-acetyl semax
Common community pattern: Pre-mixed nasal sprays are the most-purchased format due to convenience. Lyophilized vials are reserved for users who want flexibility in concentration or who plan to travel internationally.
N-Acetyl Semax — When the Variant Matters
N-acetyl semax (also called NA-Semax-Amidate or NASS) is the same 7-residue sequence with N-terminal acetylation. The acetylation:
Extends serum half-life from ~30 minutes (semax) to several hours (N-acetyl)
Increases CNS bioavailability through reduced peptidase degradation
Costs roughly 20-40% more per mg than standard semax
For users who prefer once-daily dosing rather than 2-3 daily nasal applications, N-acetyl semax is the documented variant. For users following published Russian clinical protocols (which used standard semax), the original variant is more research-backed.
Vial/Bottle Size by Protocol
Tolerance testing context:
A 5mg lyophilized vial is the smallest unit cited for testing tolerance
25 days at 200mcg/day
Standard 200-400mcg/day intranasal protocol:
30mg pre-mixed nasal spray — 75-150 days supply at standard doses
The most-cited format in vendor sales data
1 bottle per 2-5 months of use
Higher doses (600+ mcg/day):
30mg × 3 kit or other large units — the lowest per-mg tier where offered
Or N-acetyl semax for once-daily dosing convenience
Vendor Evaluation Methodology
When comparing semax vendors:
Price Competitiveness (40%)
Normalize to cost per milligram — a 30mg nasal spray and a 10mg lyophilized vial are only comparable on a per-mg basis.
COA & Testing (30%)
Third-party labs (Janoshik, MZ Biolabs, Colmaric)
Recent (within 6 months — especially important for nasal sprays)
Verifiable task number
Mass spec confirming variant (semax vs N-acetyl)
Reputation (30%)
Community feedback, shipping reliability, customer service, multi-year track record.
Shipping and Storage
Order Arrival
Lyophilized vials:
Vial integrity — no cracks, intact seal
Powder appearance — solid cake or loose powder
Labeling — batch/lot, mg content, "for research use only"
Pre-mixed nasal sprays:
Bottle integrity — intact tamper seal, working spray pump
Niche-format vendor — oral capsule peptides, pre-mixed nasal solutions, and a rare Reta + Cagrilintide combo blend, all 30% off with code thepeptidecatalog.
Most cloudy reconstitutions trace back to one thing — and it isn't the peptide. Sterile, non-pyrogenic, 0.9% benzyl alcohol — formulated for peptide reconstitution, not repackaged from generic stock.
✓ 0.9% benzyl alcohol✓ Made for peptides✓ 30 mL multi-dose
Semax is sold as a research peptide labeled 'not for human consumption.' It is approved as a finished pharmaceutical product in Russia (used in stroke recovery and as a nootropic) but is not FDA-approved in the United States. Legal status for purchasing research peptides varies by jurisdiction.
How much does semax cost per month?
Reported intranasal protocols use 200-600mcg/day. Monthly mass at 400mcg/day is 12mg, so a 30mg vial or spray lasts about 2.5 months at that amount and a 10mg vial a little under a month. Live prices by format and size are on the Best Semax Vendors page.
What format should I buy — lyophilized vial or nasal spray?
Pre-mixed nasal sprays are the most-cited format because intranasal is the documented administration route in Russian clinical practice. Lyophilized vials require user reconstitution and a dedicated nasal spray bottle. N-acetyl semax variants (more stable, longer half-life) are also available at slight premium.
What purity should I look for in semax?
Third-party HPLC at 98%+ purity, plus mass spec confirming 813.92 Da for semax (Met-Glu-His-Phe-Pro-Gly-Pro). N-acetyl semax has a different mass (855.96 Da). Make sure the COA states which variant is in the bottle — they're often confused in product listings.
Why is semax priced low compared to other peptides?
Semax is a 7-residue peptide with no unusual amino acids — synthesis is straightforward. Plus the established Russian pharmaceutical market created decades of manufacturing experience. Live per-mg prices by vendor are on the Compare Semax Prices page.
Can I buy semax from a US pharmacy?
No. Semax is approved only in Russia as a finished pharmaceutical product. Research vendors are the only documented commercial source in the US.
This article is for educational and informational purposes only. It is not medical advice and should not be used to diagnose, treat, or prevent any condition. Consult a licensed healthcare provider before using any peptide.
